This image is part of a series that was created for an open textbook, Cell Biology, Genetics and Biochemistry for PreClinical Students. The textbook will be available Late 2021.
Kindred Grey (2021). "Overview of the electron transport chain (ETC)."CC BY 4.0.
Membrane separating the inner membrane space (top) and mitochondrial matrix (bottom). From left to right, NADH dehydrogenase (Complex I) 4H+ moving down, NADH right arrow NAD+, 2e- arrow CoQ. Succinate dehydrogenase (Complex II) FAD/FADH2 cycle and 2e- right arrow cytochrome c complex. CoQ. Cytochrome c reductase (Complex III) 4H+ moving down. Cyt C. Cytochrome c oxidase (Complex IV) 2H+ moving down, ½ O2 + 2H+ right arrow H2O. ATP synthase (complex V) 3H+ moving up, ADP+Pi right arrow ATP. Phosphate transporter Pi moves up. Adenine nucleotide transporter ADP moves up and ATP moves down.